- 2 programmable call appearance/feature buttons
- Fixed feature buttons for conference, transfer, hold, speaker, and last number dialed
- Built-in 1-way (listen only) speakerphone, and eight personal ring options
- Fixed feature button, allowing access via the dialpad to 12 Definity system features
- The 6402 Telephone is compatible with Definity R6.1 or higher and Avaya IP Office.
- It requires an available station port on a TN2181, TN2224/B/CP, IP403/406, IP400 Digital Station 16, or IP400 Digital Station 30.
Avaya Definity 6402 Users Guide.pdf